feat(rln-wasm-utils): extracting identity generation and hash functions into a separate module (#332)

- separated all identity generation functions as separate functions,
rather than RLN methods
- added BE support - only for these functions so far
- covered the functions with tests, as well as conversion to big endian
- prepared for publication, but is actually awaiting the initial
publication of the RLN module

@vinhtc27, please check that everything is correct from the wasm point
of view. This module does not require parallel computing, so if there
are any unnecessary dependencies, builds, etc., please let me know.

---------

Co-authored-by: vinhtc27 <vinhtc27@gmail.com>

.github/workflows/ci.yml

@@ -9,6 +9,7 @@ on:
       - "!rln/src/**"
       - "!rln/resources/**"
       - "!utils/src/**"
+      - "!rln-wasm-utils/**"
   pull_request:
     paths-ignore:
       - "**.md"
@@ -17,6 +18,7 @@ on:
       - "!rln/src/**"
       - "!rln/resources/**"
       - "!utils/src/**"
+      - "!rln-wasm-utils/**"
 
 name: Tests
 
@@ -124,12 +126,32 @@ jobs:
         run: cargo make test_parallel --release
         working-directory: ${{ matrix.crate }}
 
+  rln-wasm-utils-test:
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest]
+        crate: [rln-wasm-utils]
+    runs-on: ${{ matrix.platform }}
+    timeout-minutes: 60
+
+    name: Test - ${{ matrix.crate }} - ${{ matrix.platform }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install stable toolchain
+        uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+      - name: Install dependencies
+        run: make installdeps
+      - name: Test rln-wasm-utils
+        run: cargo make test --release
+        working-directory: ${{ matrix.crate }}
+
   lint:
     strategy:
       matrix:
         # we run lint tests only on ubuntu
         platform: [ubuntu-latest]
-        crate: [rln, rln-wasm, utils]
+        crate: [rln, rln-wasm, rln-wasm-utils, utils]
     runs-on: ${{ matrix.platform }}
     timeout-minutes: 60
 

.github/workflows/nightly-release.yml

@@ -85,8 +85,8 @@ jobs:
           path: ${{ matrix.target }}-${{ matrix.feature }}-rln.tar.gz
           retention-days: 2
 
-  browser-rln-wasm:
-    name: Browser build
+  rln-wasm:
+    name: Build rln-wasm
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -107,7 +107,7 @@ jobs:
           components: rust-src
       - uses: Swatinem/rust-cache@v2
         with:
-          key: wasm-${{ matrix.feature }}
+          key: rln-wasm-${{ matrix.feature }}
       - name: Install dependencies
         run: make installdeps
       - name: Install wasm-pack
@@ -116,7 +116,7 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y binaryen
-      - name: Build wasm package
+      - name: Build rln-wasm package
         run: |
           if [[ ${{ matrix.feature }} == *parallel* ]]; then
             env RUSTFLAGS="-C target-feature=+atomics,+bulk-memory,+mutable-globals" \
@@ -136,18 +136,64 @@ jobs:
 
           mkdir release
           cp -r pkg/* release/
-          tar -czvf browser-rln-wasm-${{ matrix.feature }}.tar.gz release/
+          tar -czvf rln-wasm-${{ matrix.feature }}.tar.gz release/
         working-directory: rln-wasm
       - name: Upload archive artifact
         uses: actions/upload-artifact@v4
         with:
-          name: Browser-${{ matrix.feature }}-rln-wasm-archive
-          path: rln-wasm/browser-${{ matrix.feature }}-rln-wasm.tar.gz
+          name: rln-wasm-${{ matrix.feature }}-archive
+          path: rln-wasm/rln-wasm-${{ matrix.feature }}.tar.gz
+          retention-days: 2
+
+  rln-wasm-utils:
+    name: Build rln-wasm-utils
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v4
+      - name: Install stable toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: wasm32-unknown-unknown
+      - name: Install nightly toolchain
+        uses: dtolnay/rust-toolchain@nightly
+        with:
+          targets: wasm32-unknown-unknown
+          components: rust-src
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: rln-wasm-utils
+      - name: Install dependencies
+        run: make installdeps
+      - name: Install wasm-pack
+        run: curl https://rustwasm.github.io/wasm-pack/installer/init.sh -sSf | sh
+      - name: Install binaryen
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y binaryen
+      - name: Build rln-wasm-utils package
+        run: |
+          wasm-pack build --release --target web --scope waku
+
+          sed -i.bak 's/rln-wasm-utils/zerokit-rln-wasm-utils/g' pkg/package.json && rm pkg/package.json.bak
+
+          wasm-opt pkg/rln_wasm_utils_bg.wasm -Oz --strip-debug --strip-dwarf \
+          --remove-unused-module-elements --vacuum -o pkg/rln_wasm_utils_bg.wasm
+
+          mkdir release
+          cp -r pkg/* release/
+          tar -czvf rln-wasm-utils.tar.gz release/
+        working-directory: rln-wasm-utils
+      - name: Upload archive artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: rln-wasm-utils-archive
+          path: rln-wasm-utils/rln-wasm-utils.tar.gz
           retention-days: 2
 
   prepare-prerelease:
     name: Prepare pre-release
-    needs: [linux, macos, browser-rln-wasm]
+    needs: [linux, macos, rln-wasm, rln-wasm-utils]
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code